Himriksmole

The Himriksmole, also known as Groene Ster after the recreational area and nature reserve where it is located, is a drainage mill near the village of Tytsjerk, Friesland, Netherlands. It is a hollow post windmill of the type called spinnenkop by the Dutch. The mill is listed as a Rijksmonument, number 35675, and is used to raise the water level in the nature reserve.

Source: Wikipedia